From 82ce28238ffbf7a6c5054d5ff8cc484af84b5f10 Mon Sep 17 00:00:00 2001
From: Peder Bergebakken Sundt <pbsds@hotmail.com>
Date: Fri, 11 Nov 2022 12:20:29 +0100
Subject: [PATCH] pythonPackages.pyrealsense2: fix breakage

Fixes compilation error: `'cerr' is not a member of 'std'` in `wrappers/python/pyrs_device.cpp`.
This error appeared likely because either some upstream header removing the import, or because the compiler has gotten stricter.
---
 pkgs/development/libraries/librealsense/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/development/libraries/librealsense/default.nix b/pkgs/development/libraries/librealsense/default.nix
index 135969210d36..59bc2a056616 100644
--- a/pkgs/development/libraries/librealsense/default.nix
+++ b/pkgs/development/libraries/librealsense/default.nix
@@ -52,6 +52,12 @@ stdenv.mkDerivation rec {
     ./py_pybind11_no_external_download.patch
   ];
 
+  postPatch = ''
+    # https://github.com/IntelRealSense/librealsense/issues/11092
+    # insert a "#include <iostream" at beginning of file
+    sed '1i\#include <iostream>' -i wrappers/python/pyrs_device.cpp
+  '';
+
   nativeBuildInputs = [
     cmake
     ninja